S1 Jan 2011 Edexcel - Solutions (and paper) in the OP (Now On)

this paper required a lot of reading in the questions. thats where i messed up.

Well I failed that. Why did both Jun 2010 and Jan 2011 have to be the hardest S1 papers I have done - I got A's in all the other ******* past papers

sammmmmmmmmme... i know what you mean...... when i was doing the tree diagram question i actually gained a headache lol...
well i have to get over it for now have c3 next monday

Reply 222

Chawlie14

Qu 8c) I put 3.2263 instead of 2.3263 !! but then did all same qoerking as arsey, simply wrote the number wrong, how many marks am i likley to lose? like 2 or 3?

thanks

Reply 223

ALZA

Anyone have any idea what the UMS boundaries will be for this exam? :smile:

Reply 224

colgo24

haha thanks guys :biggrin:

think I got 65/75 I wonder what that is converted to in UMS ?

Reply 225

twinkabell_92

Original post by Viral28

any1 know if ill get working out marks for 8c i made such a stupid mistake :frown:

,
i didn't add 2.3263 and 1.2816.. cuz i did 152-m over s.d = 1.2816 not (-1.2816) :frown:

omgee.. i did that too.. but i attempted the question again from scratch and saw the error.. my working out was a mess though

Reply 226

cwd12

8

Original post by Arsey

I will edit this post on Saturday morning to include the paper and solutions.

I will not see the paper until after the exam!

Don't waste time sending me PMs, I don't read them. Just post questions about this paper on this thread.

The grade boundaries will not be decided until the initial marking is completed, I will be able to make an educated guess but it is a guess.

Good luck tomorrow.

A few tips...

Make sure you relate your answers to the context of the question

Learn the definitions from the mark schemes.

Learn the formulae

Do all number crunching twice

When comparing data; compare a location; compare a spread; compare skew.

Use mean if data is not skewed and has no obvious outliers, otherwise use median.

S1 Past boundaries

S1 Jan-01 72 65 58 51 44 37 31
S1 Jun-01 67 61 55 49 44 39 34
S1 Jan-02 64 58 52 46 40 35 30
S1 Jun-02 65 58 51 44 37 31 25
S1 Nov-02 70 64 58 52 46 40 34
S1 Jan-03 63 57 51 45 39 33 27
S1 Jun-03 75 69 62 55 48 41 35
S1 Nov-03 67 61 55 49 44 39 34
S1 Jan-04 72 66 60 54 48 42 36
S1 Jun-04 71 64 57 50 44 38 32
S1 Nov-04 69 63 57 51 45 40 35
S1 Jan-05 68 62 56 50 44 39 34
S1 Jun-05 67 60 53 46 39 32 25
S1 Jan-06 75 69 62 55 48 41 35
S1 Jun-06 71 65 59 53 47 41 35
S1 Jan-07 75 68 61 54 48 42 36
S1 Jun-07 72 65 58 51 44 37 30
S1 Jan-08 75 69 63 56 50 44 38
S1 Jun-08 72 66 60 54 48 42 37
S1 Jan-09 71 64 57 50 43 36 30
S1 Jun-09 75 68 60 52 44 36 29
S1 Jan-10 75 70 65 58 51 45 39
S1 Jun-10 69 62 55 48 41 35 29

can you do this with m1 and d1 and poss c3 as well???
this was so helpful. helped me relax about how well i did..

Reply 227

AHassan

for the last question where you find mean and s.d

I wrote the queation in terms of

mean + 1.6s.d= 160

same for the 2nd equation

is that not how you do it?

Reply 228

Mira1

Original post by Arsey

i have no idea, there isn't really anything wrong what you have done. The question is poorly constructed.

I added 1 for the median to get 41.8. U got 41.3 so for tht will i lose 1 mark? And then as for the comment on skewness.... are u sure its positive because as i said my method gives it negavtie skew =( thnx arsey

Reply 229

woods.vanessa

10

Failed that one!
So annoyed about that damn probability question. Took me 10 minutes to understand what it meant it was so poorly worded! Does anybody know how many marks it was worth in total? I remember there being four marks for filling in the diagram ...
Didn't have time to check my answers.
:frown:

Reply 230

Chawlie14

Original post by woods.vanessa

Failed that one!
So annoyed about that damn probability question. Took me 10 minutes to understand what it meant it was so poorly worded! Does anybody know how many marks it was worth in total? I remember there being four marks for filling in the diagram ...
Didn't have time to check my answers.
:frown:

Qu 7 was out of 17! i think, something like that.

Reply 231

charlesazoba

Hey Arsey, for question 4b i forgot to code and i used my regression line instead, would i lose both marks, also on question 7c i wrote that 4p(b) = 20/9 because (6/9)+(5/9)+(5/9)+(4/9) = 20/9 therefore 20/9 divided by 4 = 5/9, it made sense to me but it is probably wrong can you shed some light on this for me please ASAP

Reply 232

charlesazoba

Hey Arsey, for question 4b i forgot to code and i used my regression line instead, would i lose both marks, also on question 7c i wrote that 4p(b) = 20/9 because (6/9)+(5/9)+(5/9)+(4/9) = 20/9 therefore 20/9 divided by 4 = 5/9, it made sense to me but it is probably wrong can you shed some light on this for me please ASAP

I think i got 68/75 in S1 if i have the worst possible examiner, in C1 i think i got 72/75, and in C2 i think i got 67/75

Arsey what would you predict the grade boundaries for C1, C2 & S1 to be?

Reply 233

guitarmike456

9

Hey Arsey how do you get these papers?

Reply 234

paprys92

Original post by charlesazoba

Hey Arsey, for question 4b i forgot to code and i used my regression line instead

to code? there was something coded at all? I can't remember that :smile:

Reply 235

charlesazoba

Original post by paprys92

to code? there was something coded at all? I can't remember that :smile:

yh it said v = x-5/10

Reply 236

paprys92

Original post by charlesazoba

yh it said v = x-5/10

ok but PMCC is not affected by the coding :wink:

Reply 237

ALZA

Arsey if you're not aware already you made a mistake in the numbering of the question for Q7.. Just wondering if that had happened in the exam would they not mark it? because you have two question 7c's, just wondering where the examiners would stand on this :s-smilie:

Reply 238

komovalondon

Question please help!

For question 8b how did you find 1.3263, because in the table to find 0.99 you're between 1.32 and 1.34 so I used 1.32 as the value was closest to 0.99. Did you have to interpolate between the two values or something???

(edited 13 years ago)

Reply 239

paprys92

Original post by komovalondon

Question please help!

For question 8b how did you find 1.3263, because in the table to find 0.99 you're between 1.32 and 1.34 so I used 1.32 as the value was closest to 0.99. Did you have to interpolate between the two values or something???

use the "percentages" table - that small one which gives you the values for MORE THAN

S1 Jan 2011 Edexcel - Solutions (and paper) in the OP (Now On)

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